/* HelloWorld 网站样式 - 简洁现代卡片风格 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", Arial, sans-serif;
  color: #333;
  padding: 20px;
}

.card {
  background: #ffffff;
  border-radius: 20px;
  padding: 48px 56px;
  max-width: 520px;
  width: 100%;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
}

.greeting {
  font-size: 42px;
  font-weight: 700;
  color: #4a3f8f;
  margin-bottom: 12px;
}

.subtitle {
  font-size: 18px;
  color: #555;
  margin-bottom: 32px;
  line-height: 1.6;
}

.time-box {
  background: #f3f1ff;
  border: 1px solid #ddd6ff;
  border-radius: 12px;
  padding: 16px 20px;
  margin-bottom: 24px;
}

.time-label {
  font-size: 13px;
  color: #888;
  margin-bottom: 6px;
}

.time-value {
  font-size: 22px;
  font-weight: 600;
  color: #4a3f8f;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.5px;
}

.start-time {
  font-size: 13px;
  color: #aaa;
}